Extensible antenna construction



April 7, 1953 E. eARLsoN EXTENSIBLE. ANTENNA CONSTRUCTION Filed Jan. 26, 1949 mmvrox.

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Patented Apr. 7, 1953 EXTENSIBLE ANTENNA CONSTRUCTION Emil Carlson, Detroit, Mich, assignor, by mesne assignments, to H. Y. Bassett, 0. D. Marcks, and V. D. Hanna, Detroit, Mich.

Application January 26, 1949, Serial No. 72,842

7 Claims. l

This invention relates to extensible and retractable radio aerials, and particularly to motor driven telescopic aerials adapted for vehicular installation.

An important object of the invention is to provide an improved extensible aerial vertically movable by electric motor driving means controllable from a remote point, Aerials constructed in accordance with my invention are adapted to be cally actuatable aerial of the telescopic type wherein all of a plurality of telescopic sections may be etxended and retracted by power driving means controllable from a remote point, the

driving means being of novel and improved character, capable of exerting relatively high driving efiort upon the aerial sections but so arranged that the aerial sections are also directly actuatable by hand without injuring or disturbing the normal operation of any part.

Still another object is to provide an improved antenna construction of the indicated character including a tubular housing adapted to be mounted in a concealed position within the body of a motor vehicle and having power driving means included in a casing section forming a downward extension of the tubular housing and carryinz-g driving motor means also assembled therewith as a unit, the entire unit being supportable from opposite ends as a rigid assembly, an antenna being slidably extensible from the top 01 the unit, and a flexible actuating Wire connected l to the antenna and drivable by the motor being extensible from the lower end of the unit.

Other objects and advantages of the invention will become apparent upon consideration of the present disclosure in its entirety.

In the drawing:

Figure 1 is a somewhat diagrammatic side elevational view of the front portion of a motor vp'hin'le nmvided with an extensible aerial con- Figure 2 is a composite view, partly in elevation but principally comprising a section taken substantially on the line 2-2 of Figure 1, with parts broken away and looking in the direction of the arrows;

Figure 3 is a cross-sectional view on a somewhat larger scale, taken substantially on the line 3-3 of Figure 2 and looking in the direction of the arrows;

Figure 4 is a sectional view on a still larger scale taken substantially on the line 4-4 of Figure 3 and looking in the direction of the arrows;

Figure 5 is a fragmentary longitudinal sectional view also upon an enlarged scale taken substantially on the line 55 of Figure 2 and looking in the direction of the arrows; and

Figure 6 is a cross-sectional view taken substantially on the line 6-6 of Figure 5 and'looking in the direction of the arrows.

Referring now to the drawing, reference character l0 designates generally a closed motor vehicle body having a front fender portion l2, which may conveniently be made to serve as a support and enclosure for my improved antenna construction. The antenna proper consists of a plurality of rigid tubular or telescopically interfitted and slidable sections l4, l5 and I6 which are largely concealed within the fender When the antenna is retracted. The outer antenna tube 16 is supported by and slidably movable into and from a fixed supporting and contact tube l1, while the middle section [5 and inner section [4 are in turn slidably fitted in outer section [6. All of such parts are carried by a housing tube l8 of substantially larger diameter and which may be formed of aluminum tubing.

At its upper end, the housing tube I8 is connected as by screw means 20 to a tubular metallic neckpiece 22 fitted in the upper end of the tube i8 and projecting a relatively short distance thereinto. An upper portion of the neckpiece is of reduced diameter and is adapted to project upwardly through an opening as 25 in the fender 12 or other supporting body portion, a portion of the upper end of the neckpiece portion 24 'being externally threaded as indicated at 26 to receive a domed cap nut 28 which has a central opening 30 therein, substantially larger than the outer antenna section IS. The fixed contact supporting tube l1 surrounds'and slidablysupports the outer antenna section 16 and a spring wire contact brush l9 provides continuous 'elec trical connection between the antenna sections ablyengageablewith the noncircular portiomof the external guide tube section to preventun- I wanted rotation of' said actuatingmmemben under the-torque s exerted. thereon byv the driver. without p -eventing, sliding vtravel thereof...

'7 a Aremotely controllablepower; operated telescopic antennae assembly, comprisingv a tubular housing; a I plurality, of telescopically slidableantenna sections mounted in: said housing..in:sub-

stantially axialpositionand projectable. from.

and retractable into. the. housingthrough one end 0f.- the latter,; means limiting, independent travel. of said sectionsqwith. respect. to, one another; a -flexible actuating element connected to one of said sections. and. extensiblethroughthe other; thereof, .said. actuating element. extending slidably throughv and. from theaoppositeend. of the. housing, means .ior actuating said sections including adriver engageable withand rotatable concentrically about the-axis of. said actuatingzo 2,346,728

REFEEENCESZ'CITED The-followingreferences are of record Lin;- the file ofthis. patent:

UNITED' STATES PATENTS Number. Name; ,7 Date:

21299385." Barretti Oct." 2711942 2327,1631 Barrett 1---. Aug; 17;;1943 2,329,329" Brach" et.a1. .Sept. 14; 1943 Carlson. Apr.. 18,1944

April 7, 1953 R. w. MASTERS MULTICHANNEL. ANTENNA SYSTEM Filed June 30, 1949 Rbbl'l WWEEEQI'S TORNEY 

